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18 terms

Phy. Sci. - Ch. 1 Introduction

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Scientific method
is an organized set of steps that can include stating a problem, forming a hypothesis, researching, analyzing data and drawing conclusions
Hypothesis
an educated guess using what you know and what you observe
Experiment
A set of controlled observations that test the hypothesis
Variable
a factor that can cause change in the results of an experiment
Constant
variable that is not changed in an experiment
Bias
occurs when a scientist's expectations change how the results of an experiment are viewed
Control
is the standard that is used for comparison of test results in an experiment
Independent variable
is the variable that the scientist plans to change in the experiment or the factor that affects the measure of other variables
Dependent variable
variable that changes as a result of a change in the independent variable
Model
can be used to represent an idea, object, or event that is too big, too small, too complex, or too dangerous to observe or test directly
Theory
explanation of things or events based on many observations and experiments
Scientific law
a statement about what happens in nature and that seems to be true all the time
Technology
the application of science to help people
SI
is the universally accepted version of the metric system that is based on multiples of ten
Volume
The amount of space occupied by an object
Mass
the amount of matter in an object
Density
is the mass per unit volume of a material
Graph
a visual display of information or data that can provide s quick way to communicate information